sudoku games

A sudoku puzzle is a nine by nine squares puzzle, already filled with a small number of single digits. The trick is to fill in the boxes with the digits 1 to 9. The puzzle divided into nine blocks of three by three. You have to do this in a way that each horizontal and vertical line has a unique number (1-9).

The puzzle was designed by Howard Garns, a retired architect and freelance puzzle maker and first published in 1979 under the name Number Place. The puzzle was introduced in Japan by Nikoli in 1984, where it got the name sudoku (su means number, doku means independent).